Question 1

In the kinetic molecular theory of gas behavior, the distance between gas molecules is assumed to be __________ the diameter of the gas molecules.

Accepted Answer

A)  22.4 times 
B)  small relative to 
C)  dependent on 
D)  approximately the same as 
E)  large relative to 
A)  22.4 times 
B)  small relative to 
C)  dependent on 
D)  approximately the same as 
E)  large relative to

Question 2

Indicate the effect on the pressure of the following change.
-A leak occurs and gas escapes (V, T constant).

Accepted Answer

A) increases 
B) decreases 
C) no change 
A) increases 
B) decreases 
C) no change

Question 3

The air pressure on a rainy day is usually __________ air pressure on a sunny day.

Accepted Answer

A)  higher than 
B)  lower than 
C)  the same as 
A)  higher than 
B)  lower than 
C)  the same as

Question 4

In a gas, the distance between the particles is

Accepted Answer

A)  very close relative to the size of the molecules. 
B)  close relative to the size of the molecules. 
C)  fixed relative to the size of the molecules. 
D)  small relative to the size of the molecules. 
E)  very large relative to the size of the molecules. 
A)  very close relative to the size of the molecules. 
B)  close relative to the size of the molecules. 
C)  fixed relative to the size of the molecules. 
D)  small relative to the size of the molecules. 
E)  very large relative to the size of the molecules.

Question 5

A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mmHg?

Accepted Answer

A)  1.50 mmHg 
B)  507 mmHg 
C)  760 mmHg 
D)  1140 mmHg 
E)  7.5 mmHg 
A)  1.50 mmHg 
B)  507 mmHg 
C)  760 mmHg 
D)  1140 mmHg 
E)  7.5 mmHg

Question 6

In the kinetic molecular theory of gas behavior, the assumption is made that gas molecules

Accepted Answer

A)  move rapidly in random directions. 
B)  are attracted to each other by strong forces. 
C)  are close together in their container. 
D)  move with a kinetic energy equal to their centigrade temperature. 
E)  occasionally come to rest. 
A)  move rapidly in random directions. 
B)  are attracted to each other by strong forces. 
C)  are close together in their container. 
D)  move with a kinetic energy equal to their centigrade temperature. 
E)  occasionally come to rest.

Question 7

The temperature of a 500. mL sample of gas increases from 150. K to 350. K. What is the final volume of the sample of gas, if the pressure in the container is kept constant?

Accepted Answer

A)  210. mL 
B)  1170 mL 
C)  0.0095 mL 
D)  0.0470 mL 
E)  110. mL 
A)  210. mL 
B)  1170 mL 
C)  0.0095 mL 
D)  0.0470 mL 
E)  110. mL

Question 8

Oxygen makes up about __________ percent of the atmosphere.

Accepted Answer

The answer of Oxygen makes up about __________ percent of...

Question 9

As the temperature of a gas increases, the density of the gas will __________.

Accepted Answer

A)  increase 
B)  decrease 
C)  remain constant 
A)  increase 
B)  decrease 
C)  remain constant

Question 10

Gas law calculations normally require the use of the Kelvin temperature scale.

Accepted Answer

A) True 
 B)False

Question 11

According to the kinetic theory of gases, particles of a gas

Accepted Answer

A)  are very large. 
B)  are very far apart. 
C)  lose their valence electrons. 
D)  move slowly. 
E)  decrease kinetic energy as temperature increases. 
A)  are very large. 
B)  are very far apart. 
C)  lose their valence electrons. 
D)  move slowly. 
E)  decrease kinetic energy as temperature increases.

Question 12

In Gay-Lussac's Law, the pressure of a gas increases due to an increase in temperature because

Accepted Answer

A)  the molecules strike the walls of the container less often. 
B)  the molecules strike the walls of the container more often. 
C)  the molecules get bigger. 
D)  there is a decrease in the volume of the container. 
E)  there is an increase in the number of gas particles. 
A)  the molecules strike the walls of the container less often. 
B)  the molecules strike the walls of the container more often. 
C)  the molecules get bigger. 
D)  there is a decrease in the volume of the container. 
E)  there is an increase in the number of gas particles.

Question 13

Zn(s) + 2HCl(aq) → H₂(g) + ZnCl₂(aq) When 25.0 g of Zn reacts, how many L of H₂ gas are formed at STP?

Accepted Answer

A)  4.28 L 
B)  0.0171 L 
C)  8.56 L 
D)  22.4 L 
E)  0.382 L 
A)  4.28 L 
B)  0.0171 L 
C)  8.56 L 
D)  22.4 L 
E)  0.382 L

Question 14

The atmospheric pressure in Denver, CO is 633 mmHg. What is this pressure in atm?

Accepted Answer

A)  1.20 atm 
B)  633 atm 
C)  0.833 atm 
D)  1.00 atm 
E)  127 atm 
A)  1.20 atm 
B)  633 atm 
C)  0.833 atm 
D)  1.00 atm 
E)  127 atm

Question 15

Which of the following is NOT a potential use for a hyperbaric chamber?

Accepted Answer

A)  treatment for burns and infections 
B)  counteracting carbon monoxide poisoning 
C)  increasing the rate at which a broken bone heals 
D)  treating a diver with the bends 
E)  treating some cancers 
A)  treatment for burns and infections 
B)  counteracting carbon monoxide poisoning 
C)  increasing the rate at which a broken bone heals 
D)  treating a diver with the bends 
E)  treating some cancers

Question 16

A tank contains a mixture of helium, neon, and argon gases. If the total pressure in the tank is 490. mmHg and the partial pressures of helium and argon are 215 mmHg and 102 mmHg, respectively, what is the partial pressure of neon?

Accepted Answer

A)  0.228 mmHg 
B)  603 mmHg 
C)  377 mmHg 
D)  807 mmHg 
E)  173 mmHg 
A)  0.228 mmHg 
B)  603 mmHg 
C)  377 mmHg 
D)  807 mmHg 
E)  173 mmHg

Question 17

A 1.20-L container contains 1.10 g of an unknown gas at STP. What is the molecular weight of the unknown gas?

Accepted Answer

A)  1.32 g/mole 
B)  0.917 g/mole 
C)  22.4 g/mole 
D)  20.5 g/mole 
E)  1.10 g/mole 
A)  1.32 g/mole 
B)  0.917 g/mole 
C)  22.4 g/mole 
D)  20.5 g/mole 
E)  1.10 g/mole

Question 18

A barometer is a device for measuring __________.

Accepted Answer

A)  atmospheric pressure 
B)  blood pressure 
C)  gas pressure in a container 
D)  gas pressure in the lung 
E)  vapor pressure 
A)  atmospheric pressure 
B)  blood pressure 
C)  gas pressure in a container 
D)  gas pressure in the lung 
E)  vapor pressure

Question 19

Ideal Gas Law calculations require the pressure to be in units of atm.

Accepted Answer

A) True 
 B)False

Question 20

The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming constant temperature?

Accepted Answer

A)  1.2 atm 
B)  0.30 atm 
C)  3.3 atm 
D)  4.8 atm 
E)  1.0 atm 
A)  1.2 atm 
B)  0.30 atm 
C)  3.3 atm 
D)  4.8 atm 
E)  1.0 atm

Exam 7: Gases

In the kinetic molecular theory of gas behavior, the distance between gas molecules is assumed to be __________ the diameter of the gas molecules.

Indicate the effect on the pressure of the following change. -A leak occurs and gas escapes (V, T constant).

The air pressure on a rainy day is usually __________ air pressure on a sunny day.

In a gas, the distance between the particles is

A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mmHg?

In the kinetic molecular theory of gas behavior, the assumption is made that gas molecules

The temperature of a 500. mL sample of gas increases from 150. K to 350. K. What is the final volume of the sample of gas, if the pressure in the container is kept constant?

Oxygen makes up about __________ percent of the atmosphere.

As the temperature of a gas increases, the density of the gas will __________.

Gas law calculations normally require the use of the Kelvin temperature scale.

According to the kinetic theory of gases, particles of a gas

In Gay-Lussac's Law, the pressure of a gas increases due to an increase in temperature because

Zn(s) + 2HCl(aq) → H₂(g) + ZnCl₂(aq) When 25.0 g of Zn reacts, how many L of H₂ gas are formed at STP?

The atmospheric pressure in Denver, CO is 633 mmHg. What is this pressure in atm?

Which of the following is NOT a potential use for a hyperbaric chamber?

A tank contains a mixture of helium, neon, and argon gases. If the total pressure in the tank is 490. mmHg and the partial pressures of helium and argon are 215 mmHg and 102 mmHg, respectively, what is the partial pressure of neon?

A 1.20-L container contains 1.10 g of an unknown gas at STP. What is the molecular weight of the unknown gas?

A barometer is a device for measuring __________.

Ideal Gas Law calculations require the pressure to be in units of atm.

The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming constant temperature?

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